/in/foo.cc: In function 'int main()':
/in/foo.cc:9:15: error: expression list treated as compound expression in initializer [-fpermissive]
  scanf("%d",&n);
               ^
/in/foo.cc:9:15: warning: left operand of comma operator has no effect [-Wunused-value]
/in/foo.cc:9:15: error: invalid conversion from 'int*' to 'int' [-fpermissive]
/in/foo.cc:12:23: error: 'scanf' cannot be used as a function
   scanf("%d%d",&ti,&ki);
                       ^
/in/foo.cc:15:18: error: 'scanf' cannot be used as a function
    scanf("%d",&xi);
                  ^